Year	% of total population ages 15+ (national estimate)
1982	76.66957184211192
1990	73.78583436296506
2000	69.78932445407389
2001	71.08756812572722
2002	70.96442487856696
2003	70.46810940569314
2004	69.90656531137549
2005	69.23438633868335
2006	68.82600205030707
2007	68.28236694726145
2008	67.94968188334778
2009	67.77011992599928
2010	66.6957863182251
2011	66.71636489455999
2012	66.40184837543272
2013	66.54049354574332
2014	66.06276708906685
2015	66.61644425233688
2016	66.39166477302045